# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 175   b = 168   c = 321.42

Area: T = 9619.599875207
Perimeter: p = 664.42
Semiperimeter: s = 332.21

Angle ∠ A = α = 20.87325836444° = 20°52'21″ = 0.3644295308 rad
Angle ∠ B = β = 20.00111679751° = 20°4″ = 0.34990862354 rad
Angle ∠ C = γ = 139.1266248381° = 139°7'35″ = 2.42882111102 rad

Height: ha = 109.9388271452
Height: hb = 114.5199032763
Height: hc = 59.85768773074

Median: ma = 241.063256076
Median: mb = 244.7699091594
Median: mc = 59.97332932229

Inradius: r = 28.95663792543
Circumradius: R = 245.5865815052

Vertex coordinates: A[321.42; 0] B[0; 0] C[164.4454988489; 59.85768773074]
Centroid: CG[161.9554996163; 19.95222924358]
Coordinates of the circumscribed circle: U[160.71; -185.7010534342]
Coordinates of the inscribed circle: I[164.21; 28.95663792543]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 159.1277416356° = 159°7'39″ = 0.3644295308 rad
∠ B' = β' = 159.9998832025° = 159°59'56″ = 0.34990862354 rad
∠ C' = γ' = 40.87437516195° = 40°52'26″ = 2.42882111102 rad

# How did we calculate this triangle?

### 1. The triangle circumference is the sum of the lengths of its three sides ### 2. Semiperimeter of the triangle ### 3. The triangle area using Heron's formula ### 4. Calculate the heights of the triangle from its area. ### 5. Calculation of the inner angles of the triangle using a Law of Cosines    